I would stay away from it.
Our local service bureau ran one for many years. They would have to go in there just about every day and clean out the ink inside the paper transport area. The early HP thermal heads could be quite messy. I believe they had about 12 channels and produced really great gamut for the time, with orange and blue channels, but the inks were not very permanent that they used and were fairly expensive. It was a very costly unit for it's time, I believe over $30,000.00. The one they had was really big, like 72" I believe. I would consider this printer technology a relic of the past and wouldn't go there for any reason personally considering the quality, speed, and price of what we have available today. I would say if you need a really big printer go for the Epson 11880 used or new.
john